Demountable tire rim



March 10, 1925- 1,529,196 L. 'D. MCDOWELL v DEMOUNTABLE TIRE RIM Filed Sept. 5, 1924 F 5 I glyvvwnio c Patented Mar. 10, 1925.

LEONARD/D; McDOW-ELL, on FLINT; .MICI-IIGAM DEMOUNTABLE TIRE RIM.

ApplicationfiIedT Sptmbeif5, 1924. Serial No. 736,078.

To' all zuhom ii mag/concerni- I Be- 1t known that I, LEONARD D. Me'- DOWEL'L, a citizen of the-United States, re

siding. at Flint, in the county of Gene'see" and State of" Michigan, h'ave invented certain new and useful Improvements in a mountable Tire Rim, ofwhich the following is a"sp'ecification'.'

This invention relates to a dernountable tire rim designed for use in connection with automobile wheels.

Broadly, the invention comprises a split rim provided at the split ends with means for expanding and contracting the rim to facilitate application and removal of a tire, the expanding and contracting means being built into the rim and constituting a permanent part thereof.

It follows that it is one feature of the invention to stamp out openings at the free abutting ends to receive a pivotallymounted lever and connecting means between the same and one of the split ends so as to permit these parts to fold into the openings to eliminate objectionable projection on either side of the rim base.

It is also a feature to provide coacting means between the free end portions of the lever and the adjacent rim end which guard against circumferential expansion and thereby eliminate the pivotal connection of excessive strain.

A presentation of additional features and advantages will be made by the following description.

In the drawing Figure 1 is a side elevation, partly in section of a demountable rim constructed in accordance with the present invention showing the same in a contracted state.

Figure 2 is an enlarged detail perspective view of the split end showing the contracting and expansion means more clearly.

Figure 3 is a detail inner peripheral plan view. 7

In carrying out the invention, I provide a rim which is composed of sections 1 and 2 hingedly connected together as indicated at 3 to permit their free ends to be arranged in abutting relation. The section 1 occupies substantially threequarters of the circumference, while the section 2 is comparatively shorter and constitutes about one-quarter of the circumference. In the present instance, the base of the section 2 is provided with an elongaged slot 4 adjacent its free end ously,

as seen clearly in Figure 2. At tlieeX trem'ity. of the free end it is provided with a notclr 5"of greater width than. the slot. Btn e'eirth'eslot and 'notch is' a cr'o'ss piece 6 winch serves the purpose hereafter tb' be described: The?freeend of tlie'se ctionl is f provided with slot 7* opening thro'ugli the-"extremity.- The-Oates end of the" slot 7 is widened, being of same width as the aforesaid notch 5. To retain the rigidity, a cross piece 8 is provided to span the inner end of the slot 7. I

These openings in the rim base serve to. accommodate the expanding and contracting means, which as before stated, comprises a lever 9 andv a connection, in the present instance comprising a pair of duplicate links 10. At 11, the lever is pivotally connected to the rim section 1. Adjacent this pivot, the inner end portion 12 is sub-. stantially wide and is adapted to occupy the correspondingly sized slot 7. Fromits intermediate portion to its free end, the lever is decreased in width as indicated at 13. This relatively narrow portion is provided with a depression 14 forming a seat for reception of the aforesaid cross piece 6. Abutting the shoulder-'- formed at the juncture of the relatively wide andnarrow portions of the lever and pivotally connected to the latter as at 15 are the aforesaid links 10.

The links are connected at their opposite ends as at 16 to the rim section 2.

The links 10 are of a length to extend beyond the notch 5 into the widened outer end of the slot 7 so as to bridge the split between the rim ends. It is yet to be pointed out that a suitably designed turn button 17 is pivoted to the rim section 2 at the inner end of the slot 4 and is adapted to be swung over the free end of the lever to retain the latter in closed position. Obviwhen the lever is not closed, the wide portion occupies the slot 7 while the free end portion of the narrow part is received'in the slot 4. At this time the cross piece 6 is received in the seat 14 while the con necting links 10 are received in the notch 5 and widened outer end of the slot 7 thus transverse separation of the split ends of the rim is prevented and accidental contraction is likewise prevented. E

In applying a tire to the rim, the turn button 17 is disengaged from the lever and the latter is pried with a suitable instrument to start it upon its pivot if this is "foot against the lever to swing the latter outwardly obviously serves to expand the" rim to its normal state. Having thus described the lnventlon, What I claim 1s c A demountable Vided with an elongated slot opening throughthe extremity of the base portion,

' the other, end being provided with a slot and a notch formed in its base portion and separated by a cross piece, alever pivotally tire rim comprising a split run, one of the free ends of Whlch is pro connected to the first named end and having portions swlngable into sa1d slot and notch the lever provided intermediate its ends With a seat for reception of said cross piece, and a pan of links plvotally connect-- ed to the second named end and'with the intermediate portion of said lever, said links being; arranged 1n said notch and being swlngable into said first named slot abutting ends of the rim, and retaining means for maintaining the lever in closed position. a

ture.

LEONARD'D. MoDOWELL.

In testimony whereof I afiix mysignato bridge the split occurring between then 

